RKI OPLS vs Spark Tester
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RKI OPLS
Monitor readings and detector status for RKI's OPLS detector. Adjust operational parameters remotely. Essential for managing environmental monitoring equipment.
- View detector readings
- Check detector status
- Change operation parameters
- Remote monitoring
- Device management
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For RKI’s OPLS detector. View readings and detector status. Change operation parameters
Spark Tester
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This app provides Bluetooth connectivity to the Solmax S-100 Spark Tester. It enables users to apply activation codes and monitor the remaining activation time.
Screenshots
Verdict
The clearest difference is update cadence: RKI OPLS at every 2 months against Spark Tester's every 41 months. Spark Tester's advantage is iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
RKI OPLS ships an update every 2 months, Spark Tester every 41 months. The most recent releases landed on September 25, 2026 and October 25, 2026 respectively.
| Parameter | RKI OPLS | Spark Tester |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months — better | Every 41 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 55 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | RKI Instruments, Inc. | John Dee Martin Company |
In-app purchases
RKI OPLS
No in-app purchases
Spark Tester
No in-app purchases
Questions
Is RKI OPLS free?
Is Spark Tester free?
Do RKI OPLS or Spark Tester have ads?
Which is updated more often, RKI OPLS or Spark Tester?
Other comparisons
